Improvement in adding-machines



UNITED STATES EMERY M. HAMILTON, OF NEI/V YORK, N. Y.

IMPROVEMENT IN ADDING-MACHINES.

Specification forming part of Letters Patent No. 117,169, dated July 18, 1871.

T0 all whom yit may concer/n:

Be it known that I, EMERY M. HAMILTON, of New York city, in the county and State ot New York, have invented a new and Improved Adding-Machine,A and I do hereby declare that the following' is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had t0 the accompanying drawing forming part of this specification.

This invention relates to improvements in machines for adding, tallying, registering, and the like; and it consists in the followingdescribed arrangement of apparatus- Figure l in the drawin being partly a plan view and partly a horizontal section. Fig. 2 is a transverse section through the machine taken on the line a' w or' Fig. 1. Fig. 3 is a horizontal section. Fig. 4 is a plan with a part of the case broken out; and Fig. 5 is a plan, showing a slight modification of a part of the apparatus.

Similar letters of reference indicate corresponding parts.

A is a large circular disk arranged on a pivot in a rectangular case, I3, of any suitable kind, and having one hundred notches and teeth in the periphery, which notches are correspondingly numbered on the margin. ot' the upper side ot' the wheel. These numbers I have arranged `in two columns, in which the jfigures oi' one are opposite the spaces between those of the other, as shown, by which I am enabled to have them twice as large as they would be it' arranged in one column, so that they may be seen more distinctly in reading them through the aperture D in the case, which, because ot' this arrangement, is made long enough to expose the tigures of both columns to view, but, bein g only as wide as the height oi' the tgures, will expose in full those iigures to be read, while only parts of two numbers or' the opposite column will be seen. If, however, it be desirable not to expose the figures at all which are not to be read, I propose to arrange a slide or cover or' any kind, to be shifted from end to end ot' the opening I), according to which column is to be exposed, tor hiding the other, said cover or slide to be actuated in any way by the disk or other means. li" the disk be employed for the purpose it may have a zigzag groove corresponding to the two rows of iigures 5 and the slide may have a pin working in said groove to move it back and forth, or any other equivalent means may be adopted for working said slide. The disk A has a small pinion, F, which gears with a toothed wheel, G, about haltl the diameter of A, or a little more, arranged under it and covering a column or' iigures-say from one to ten on its upper margin-to be read, in connection with those on the disk A, through an aperture, H, in the case, coinciding radially with the one l). ln consequence oi' the said wheel G being geared with A so as to move a small amount at each movement oi' A, each tigure of the column on it is repeated, as shown, so as to read the same until disk A has turned a whole revolution, when the next higher ligure is brought to view. This change takes place when ligure one of the column on A is brought to view through aperture I). It' I wish to enlarge the capacity of the machine I add another wheel similar to G, mnnbered in the same way, and driven, by a pinion on it, so as to make one revolution to ten of said wheel G. These wheels are to be caused to be turned by a watch or other spring attached to one or the other end and wound up for the purpose. In this example I have represented an elastic India-rubber spring, I, as the means of operating them, said spring being attached to a drum, K, on the under side of wheel (i, and shown dotted, and stretched over a guidepulley, L, to a studpin, M, to which thc other end is connected, and for winding up or stretching the said spring I use a small cord, N, also wound on the drum K, but in the opposite direction to that of the spring, so that, by pulling cord N outward, it will wind the spring upon the drum ready for turning it backward in operating the machine when said disk is let tree from its holder. The said holder consists ot" a slotted pin, O, on a bell-crank, l), held in the notches O or.' said disk A by a spring, QJ. This bell-crank is pivoted, near the apex or' its angle, on a stud-pin, It, so that the long arm T lies just inside ofthe wall U of the case, and the hole Y through it for the pivot-pin is elongated to allow it to move on said pin for releasing the disk A when it is to be wound up, and engaging it again when wound up to hold it. The disen ga ging ofthe said stud-pin irom the wheel is et i'ected by the act of pulling out the cord N for winding by drawving it to the left against the pin W", which causes the bell-crank to slide on its pivot at the same time that the wheels are set in motion for winding up, and the reverse movement is et'tected by the spring' Q, and takes place as soon as the strain on cord N is released. The long arm T ofthe bell-crank has a long proj ectiou, X, on the upper edge, extending through a long slot in the wall U of the case. Said projection has nine notches, Y, in the outer edge, which are numbered from one to nine, consecutively, beg'innin at the end nearest to the pivot It. Said notches have the same pitch that the notches C of the disk A have. Z is a bar arranged on the long arm T of the bell-crank to slide forward and backward along' thc notches Y. It has a projection, a, extending from the upper edg'e along the surface ci" the notched projection X beyond the said notches, and the lower edge is provided with notches b on the lower or inner edge, which will be eng'ag'ed with the notches ot' disk A when the long arm T of the bell-crank is pushed inward, so that the said bar Z will be moved to the right along' the notches Y by the turning ot' the disk. The said notched bar Z is moved back to the left again by the lever d and the spring e when disengaged trom the disk. The arm T ot' the bell-crank is allowed to vibrate toward and from the disk enough to engage the teeth oil' slide Z with it while disenga ging' pin (l), and vice versa, the amount et' said vibration being limited by the wall U oi' the case and the stud-pinj". The movement toward the wheel is caused by pushing on the notched projection X by hand, and in the other direction by the springs Q.

The operation is as i'ollows: A pencil or other small or pointed pusher, represented by the dotted lines g, Fig. being placed in a notch, y, opposite the number (say tive) on projection X ot' the bell-crank, which is to be added to the number seen through aperture D, (say thirtyfour,) and the bell-crank being' pushed inward thereby so that stud-pin O is disengaged from the disk and the notched bar Z engaged with it, the disk A will be tree to be turned by the spring' I, and it will move slide Z to the right until projection o comes against the pencil resting in notch number live, when it and the disk will be arrested, and, as the movement ofthe disk at the part havin g the numbers on it is the same as that ot the slide, it will have moved so as to show thirtynine, being' the sum ot' five added to thirty-four. The pencil now being removed and the stud-pin 0 brought back into a notch of disk A, and the notched bar disengaged therefrom by the spring c, the disk will be prevented from further movement, and the slide Z will be moved back to the left ready for another operation by spring e and lever d, which operation may be represented, as betere, as many times i s there are ii gures in the column to be added. lhenthe sum ot' tgurcs added has amounted to more than one hundred, a iigure one will be seen through aperture H, which, being' read with those seen through aperture D, will give the sum et' the column added.

Instead of the wheel Gr for carrying' the hundreds, I have used a tape for the purpose, the said tape being' also used for winding up the spring and setting the disk, being wound upon a hub ofthe disk containing a coiled spring, and having a column ot' figures marked on it beginning near the end attached to the drum, and so arranged in respect ot' the distance apart that a number will be brought to the aperture inthe ci se through which the tape works each time the disk A has made one revolution; and this aperture is arranged near the one l) so that the iig'ures may be conveniently read together. This arrangement is represented vin Fig. 5, where A is the disk and N the tape for winding up the spring, setting the disk, and carrying the hundreds.

I propose to make use ot' either of these modes ot' adding the hundreds in connection with the other apparatus, as may be required by the nature of the case in hand.

It will be understood that the column ot' iigures on the disk A, the said disk, and the carrying apparatus may be arranged tor any measure or table, either i'or adding, tallying, or registering, as may be required tor diiterent branches ot' business or calculations.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. rlhe combination of the disk A, bell-crank, and slide Z, the disk being' provided with a spring for actuating it, either being directly applied to it or to another wheel gearing with it, also being' notched and iigured as described, the bell-crank being' provided with the stud-pin and the notched and iigured projection, the slide being notched as described, and having a spring i'or working' it in one direction, and all being' a1'- ranged relatively to each other and operatingI substantially as speciiied.

2. The arrangement ot' the bell-crank on its pivot alld with the disk A, for sliding' the pin from and to the said disk tor releasing and engaging' it when winding up the, actimting-sprin of said disk, substantially as speciiied.

3. The arrangement ot' the said sliding bellcrank and the spring-windingI cord N, whereby the disk is disengaged simultaneously with and by the application otthe power tor winding up the said aetuatillg-spring et' the disk, substantially as specified.

EMERY M. HAMILTON.

IViti x esses:

Guo. W. Maman, ALEX. F. tonnn'rs. 

